# HTS 2918: Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives:

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Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=2918). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 2918: Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 2918 | Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives: |  |  |  |  |
|  |   Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: |  |  |  |  |
| 2918.11 |     Lactic acid, its salts and esters: |  |  |  |  |
| 2918.11.10.00 |       Lactic acid | 5.1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg |
| 2918.11.51.00 |       Other | 3.4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.12.00.00 |     Tartaric acid | Free |  | 17% | kg |
| 2918.13 |     Salts and esters of tartaric acid: |  |  |  |  |
| 2918.13.10.00 |       Potassium antimony tartrate (Tartar emetic) | Free |  | 4% | kg |
| 2918.13.20.00 |       Potassium bitartrate (Cream of tartar) | Free |  | 11% | kg |
| 2918.13.30.00 |       Potassium sodium tartrate (Rochelle salts) | Free |  | 11.5% | kg |
| 2918.13.50.00 |       Other | 4.4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.14.00.00 |     Citric acid | 6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 39.5% | kg |
| 2918.15 |     Salts and esters of citric acid: |  |  |  |  |
| 2918.15.10.00 |       Sodium citrate | 6.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 42% | kg |
| 2918.15.50.00 |       Other | 3.7% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.16 |     Gluconic acid, its salts and esters: |  |  |  |  |
| 2918.16.10.00 |       Gluconic acid | 6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.16.50 |       Other | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% |  |
| 2918.16.50.10 |         Sodium gluconate | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.16.50.20 |         Calcium gluconate | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.16.50.90 |         Other | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.17.00.01 |     2,2-Diphenyl-2-hydroxyacetic acid (benzilic acid) | 5.8% | Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 40% | kg |
| 2918.18.00.00 |     Chlorobenzilate (ISO) | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.19 |     Other: |  |  |  |  |
|  |       Aromatic: |  |  |  |  |
| 2918.19.11.00 |         Benzilic acid, methyl ester | 5.8% | Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 40% | kg |
|  |         Phenylglycolic acid (Mandelic acid), its salts and esters: |  |  |  |  |
| 2918.19.12.00 |           Mandelic acid | Free |  | 15.4¢/kg + 67.5% | kg |
| 2918.19.15.00 |           Other | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO, K,KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 67.5% | kg |
|  |         Other: |  |  |  |  |
| 2918.19.20.00 |           Products described in additional U.S. note 3 to section VI | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.19.31.00 |           Other | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
|  |       Other: |  |  |  |  |
| 2918.19.60.00 |         Malic acid | 4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2918.19.90.00 |         Other | 4% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 25% | kg |
|  |   Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: |  |  |  |  |
| 2918.21 |     Salicylic acid and its salts: |  |  |  |  |
| 2918.21.10.00 |       Suitable for medicinal use | 6.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 72% | kg |
| 2918.21.50.00 |       Other | 6.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.22 |     O-Acetylsalicylic acid, its salts and esters: |  |  |  |  |
| 2918.22.10.00 |       O-Acetylsalicylic acid (Aspirin) | 6.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 82% | kg |
| 2918.22.50.00 |       Salts and esters of O-acetylsalicylic acid | 6.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 47.5% | kg |
| 2918.23 |     Other esters of salicylic acid and their salts: |  |  |  |  |
| 2918.23.10.00 |       Salol (Phenyl salicylate) suitable for medicinal use | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 45% | kg |
|  |       Other: |  |  |  |  |
| 2918.23.20.00 |         Odoriferous or flavoring compounds | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 58% | kg |
|  |         Other: |  |  |  |  |
| 2918.23.30.00 |           Products described in additional U.S. note 3 to section VI | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.23.50.00 |           Other | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.29 |     Other: |  |  |  |  |
| 2918.29.04.00 |       2,3-Cresotic acid; 2-Hydroxybenzoic acid, calcium salt; 1-Hydroxy-2-naphthoic acid; 2-Hydroxy-1-naphthoic acid; 1-Hydroxy-2-naphthoic acid, phenyl ester;α-Resorcylic acid;γ-Resorcylic acid; and 5-Sulfosalicylic acid | 5.8% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 40% | kg |
| 2918.29.06.00 |       1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate) | 5.8% | Free (A+,AU,BH,CL,CO,D,E, IL,JO,KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 40% | kg |
| 2918.29.08.00 |       m-Hydroxybenzoic acid | Free |  | 15.4¢/kg + 40% | kg |
| 2918.29.20.00 |       Gentisic acid; and Hydroxycinnamic acid and its salts | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 48.5% | kg |
| 2918.29.22.00 |       p-Hydroxybenzoic acid | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 48.5% | kg |
| 2918.29.25.00 |       3-Hydroxy-2-naphthoic acid | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.29.30.00 |       Gallic acid | 1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 2% | kg |
| 2918.29.39.00 |       4,4-Bis(4-hydroxyphenyl) pentanoic acid; and 3,5,6-Trichlorosalicylic acid | Free |  | 15.4¢/kg + 57% | kg |
|  |       Other: |  |  |  |  |
| 2918.29.65.00 |         Products described in additional U.S. note 3 to section VI | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.29.75.00 |         Other | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.30 |   Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: |  |  |  |  |
|  |     Aromatic: |  |  |  |  |
| 2918.30.10.00 |       1-Formylphenylacetic acid, methyl ester | 5.8% | Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 40% | kg |
| 2918.30.15.00 |       2-Chloro-4,5-difluoro-ß-oxobenzenepropanoic acid, ethyl ester; and Ethyl 2-keto-4-phenylbutanoate | Free |  | 15.4¢/kg + 57% | kg |
|  |       Other: |  |  |  |  |
| 2918.30.25 |         Products described in additional U.S. note 3 to section VI | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% |  |
| 2918.30.25.10 |           Methyl 3-oxo-2-phenylbutanoate (methyl alpha-phenylacetoacetate, MAPA) | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.30.25.50 |           Other | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.30.30.00 |         Other | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
|  |     Other: |  |  |  |  |
| 2918.30.70.00 |       Dimethyl acetyl succinate; Oxalacetic acid diethyl ester, sodium salt; 4,4,4-Trifluoro-3-oxobutanoic acid, ethyl ester; and 4,4,4-Trifluoro-3-oxobutanoic acid, methyl ester | Free |  | 25% | kg |
| 2918.30.90.00 |       Other | 3.7% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG) | 25% | kg |
|  |   Other: |  |  |  |  |
| 2918.91.00.00 |     2,4,5-T (ISO) (2,4,5-trichlorophenoxyacetic acid), its salts and esters | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 48.5% | kg |
| 2918.99 |     Other: |  |  |  |  |
|  |       Aromatic: |  |  |  |  |
| 2918.99.05.00 |         p-Anisic acid; Clofibrate; and 3-Phenoxybenzoic acid | 5.8% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 40% | kg |
| 2918.99.06.00 |         1-Hydroxy-6-octadecyloxy-2-naphthalene- carboxylic acid; and 1-Hydroxy-6-docosyloxy-2-naphthalene- carboxylic acid | Free |  | 15.4¢/kg + 57% | kg |
| 2918.99.14.00 |         2-(4-Chloro-2-methylphenoxy)propionic acid and its salts | Free |  | 15.4¢/kg + 40.5% | kg |
|  |         Other: |  |  |  |  |
|  |           Pesticides: |  |  |  |  |
| 2918.99.18.00 |           4-(4-Chloro-2-methylphenoxy) butyric acid;p-Chlorophenoxyacetic acid; and 2-(2,4-Dichlorophenoxy) propionic acid | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 40.5% | kg |
| 2918.99.20 |           Other | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 48.5% |  |
| 2918.99.20.10 |           2,4-Dichlorophenoxyacetic acid, its salts and esters | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 48.5% | kg |
| 2918.99.20.15 |           2-Methyl-4-chlorophenoxyacetic acid | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 48.5% | kg |
| 2918.99.20.50 |           Other | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 48.5% | kg |
| 2918.99.30.00 |           Drugs | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 47.5% | kg |
| 2918.99.35.00 |           Odoriferous or flavoring compounds | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 58% | kg |
|  |           Other: |  |  |  |  |
| 2918.99.43 |           Products described in additional U.S. note 3 to section VI | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 57% |  |
| 2918.99.43.10 |           2-Methyl-3-phenyloxirane-2-carboxylic acid (P-2-P methyl glycidic acid), its salts and esters | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.99.43.50 |           Other | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.99.47.00 |           Other | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 57% | kg |
| 2918.99.50.00 |       Other | 4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
|  |   VIII. ESTERS OF INORGANIC ACIDS OF NONMETALS AND THEIR SALTS, AND THEIR HALOGENATED, SULFONATED, NITRATED OR NITROSATED DERIVATIVES |  |  |  |  |